The EM-190 replacement control Pak will replace many old Brett Aqualine control systems, including old-style EM/CM 190 control boxes.  The current unit is an air acuated control system, any old-style digital system will require a new topside to go with it.  Any EM-190 will operate on either 120V or 240V with the exception of the 2-Pump model (240V only). All systems include a 120V ozone receptacle and a receptacle for a 120V topside.  the 2HP model also includes a secondary pump receptacle (240V) for a single speed booster pump.